Patents by Inventor David W. Jiral

David W. Jiral has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for an appliance with a power saving mode
    Patent number: 8932412
    Abstract: A dishwasher configured to perform a physical cycle of operation and having a power savings mode during which the dishwasher periodically monitors a key press by a user to determine if the dishwasher should be taken out of the power savings mode.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: January 13, 2015
    Assignee: Whirlpool Corporation
    Inventors: Nelson J. Ferragut, II, David W. Jiral, Paul R. Johnson, Waldemar Romanowski, Ryan K. Roth
  • METHOD AND APPARATUS FOR AN APPLIANCE WITH A POWER SAVING MODE
    Publication number: 20130000674
    Abstract: A dishwasher configured to perform a physical cycle of operation and having a power savings mode during which the dishwasher periodically monitors a key press by a user to determine if the dishwasher should be taken out of the power savings mode.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 3, 2013
    Applicant: WHIRLPOOL CORPORATION
    Inventors: NELSON J. FERRAGUT, II, DAVID W. JIRAL, PAUL R. JOHNSON, WALDEMAR ROMANOWSKI, RYAN K. ROTH
  • Anti-windup proportional plus integral controller
    Patent number: 5298845
    Abstract: A proportional plus integral controller operates an actuator in an HVAC system. The controller includes a setpoint circuit for providing a setpoint signal representative of a desired room temperature, a sensor circuit for providing a sensor signal representative of the actual room temperature, an error generator for generating an error signal proportional to the difference between the setpoint signal and the sensor signal, and an integrator for generating a control signal related to the time integral of the error signal. The setpoint and sensor signals are derived from a common voltage reference, so that accuracy of the controller is substantially independent of fluctuations of that reference. The integrator includes a capacitance multiplier that provides highly accurate integration of the error signal and a switch for selecting either proportional plus integral or proportional only control.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: March 29, 1994
    Assignee: Johnson Service Company
    Inventors: David P. DeBoer, David W. Jiral